Emoji picker: Round down window width (estimated list size)

src/components/EmojiPicker/EmojiPickerMenu/BaseEmojiPickerMenu.js

@@ -112,6 +112,10 @@ function BaseEmojiPickerMenu({headerEmojis, scrollToHeader, isFiltered, listWrap
     const styles = useThemeStyles();
     const {windowWidth, isSmallScreenWidth} = useWindowDimensions();
 
+    // Estimated list size should be a whole integer to avoid floating point precision errors
+    // More info: https://github.com/Expensify/App/issues/34522
+    const listWidth = isSmallScreenWidth ? Math.floor(windowWidth) : CONST.EMOJI_PICKER_SIZE.WIDTH;
+
     const flattenListWrapperStyle = useMemo(() => StyleSheet.flatten(listWrapperStyle), [listWrapperStyle]);
 
     return (
@@ -134,7 +138,7 @@ function BaseEmojiPickerMenu({headerEmojis, scrollToHeader, isFiltered, listWrap
                     ListEmptyComponent={ListEmptyComponent}
                     alwaysBounceVertical={alwaysBounceVertical}
                     estimatedItemSize={CONST.EMOJI_PICKER_ITEM_HEIGHT}
-                    estimatedListSize={{height: flattenListWrapperStyle.height, width: isSmallScreenWidth ? windowWidth : CONST.EMOJI_PICKER_SIZE.WIDTH}}
+                    estimatedListSize={{height: flattenListWrapperStyle.height, width: listWidth}}
                     contentContainerStyle={styles.ph4}
                     extraData={extraData}
                     getItemType={getItemType}

src/components/EmojiPicker/EmojiPickerMenu/index.native.js

@@ -126,7 +126,7 @@ function EmojiPickerMenu({onEmojiSelected, activeEmoji}) {
                 listWrapperStyle={[
                     listStyle,
                     {
-                        width: windowWidth,
+                        width: Math.floor(windowWidth),
                     },
                 ]}
                 ref={emojiListRef}